Whirls is right, seek alternatives (I made my own kneeboard too, much better than commercial ones!!).
The main problem is putting the words 'Aviation' or 'Pilot' in the title, this causes the cost of anything to immediately double despite there being no other reason (quality, value for money etc.).
In my job, the words 'Broadcast' or 'Transmission' have the same effect but triple the cost. (Apparantly, my friends who do boaty/sailing-type things tell me 'Marine' does the same).